When did christianity become the dominant religion in europe? just after the death of christ during the middle ages during the 400s and 500s during the twenty-first century

When did Christianity become the dominant religion in Europe?

C. During the Middle Ages

Although during the 400s and 500s Christianity was already a dominant religion in the Roman Empire and Armenia, it was during the early Middle Ages in which most of the European countries had Christianity as a dominant religion. This is due to the process of Christianization that had started long before the 7th century, but that flourished beginning with Great Britain and Ireland. On the span of seven centuries, the Germanic, Scandinavian, Baltic and West Slavic populations, among others, had all been Christianized.  

C

Explanation:

answer; i believe the correct answer is (favorable balance);